Manufacture of a substituted guanidine



Patented Oct. 8, 1929 UNITED STATES PATENT OFFICE WINFIELD SCOTT, OF NITRO, WEST VIRGINIA, ASSIGNOR TO THE RUBBER SERVICE LABORATORIES COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO MANUFACTURE OF A SUBSTITUTED GUANIDINE N'o Drawing. Original application filed April 8, 1927,

January 14, 1928.

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c crn which new product is an accelerator of the rubber vulcanization process.

This compound has been prepared by reacting phenetidyl mustard oil with p-amino-dimethyl-aniline to produce a thiourea and then desulphurizing in any desired manner.

the thiourea so formed.

The intermediate thiourea compound desired was manufactured preferably by combining under reacting conditions, substantially 17 9 parts (one molecular proportion) of phenetidyl mustard oil with approximately 135 parts by weight (one molecular proportion) of p-amino-di-methyl-aniline. The reaction that took place is represented most conveniently as follows:

Serial No. 182,186. Divided and this application filed Serial N0. 246,922.

thereto of a suitable alkali, such as caustic soda andthe precipitated guanidine deriva tive was then filtered and washed and combined with the product obtained from the alcoholic liquor. The,product can be further purified, if necessary, by redissolving it again in an acid and precipitating as before with caustic. The resulting product, p-di-methylamino-phenyl-pphenetidyl guanidine, has the composition represented by the following formula OH: N N

\NHOOGZHE Having described this example of the invention, I do not wish to be understood as beinglimited to the exact proportions, ingredients, temperatures and steps set forth, for various changes may be made without departing from the essential features of my invention. The invention is limited solely by the claims attached hereto as a part of this specification wherein it is intended to claim the invention as broadly as is possible.

N ctntrooano The resulting tliioureacompound so obtained was then desulphurized in any desired mannerbut preferably by treatment with a lead compound while warming under pressure in the presence of ammonia. Preferably, the ammonia was employed in the form of an alcoholic solution thereof. The heating of the mix was continued for a period of time necessary to produce substantially complete combination of the substances whereupon the mass was allowed to cool, any excess pressure was released, and the reaction prodnot was filtered. The residuum was then washed with a dilute acid such as hydrochloric acid to dissolve any'guanidine derivative from unchanged thiourea which may remain This case is a division of application Serial No. 182,186, filed April 8, 1927.

What I claim is:

l. The process of making p-di-methylamino-phenyl-p-phenetidyl-guanidine, which comprises reacting phenetidyl mustard oil 3. The process'of making p-di-methylamino-phenyl-p-phenetidyl-guanidine, which comprises reacting henetidyl mustard oil with p-amino-di-met yl-aniline to produce a thiourea and then desulphurizing the thiourea so formed by treatment With a lead compound While Warming under pressure in the presence of an alcoholic solution of ammonia.

4. The process of making p-di-methylamino-phenyl-p-phenetidylguanidine, which comprises reacting substantially equimolecular proportions of phenetidyl mustard oil and" p-amino-di-methyl-aniline to produce p-dimethyl-amino-phenyl-p-phenetidyl thiouera, and then desulphurizing the thiourea so formed by treatment with a lead compound While Warming under pressure in the presence of an alcoholic solution of ammonia, and isolating the p-di methyl amino phenyl-pphenetidyl guanidine thus formed.

5. As anew article of manufacture, a subtituted guanidine having the empirical formula H N O, said guanidine containing the ethoxy-phepyl and the dimethyl-anilino groupings.

6. As a new article of manufacture p-dimethyl amino phenyl p phenetidyl guanidine, having the formula I CH:

said product obtainable by reacting phenetidyl mustard oil With p-amino-di-methyl aniline to produce a thiourea and then desulphurizing the thiourea so formed in the presence of ammonia.

In testimony whereof I hereunto aflix my I signature.

WINFIELD SCUTT.

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